Coal mine paste filling mining isolation device

Abstract

The invention relates to the technical field of coal mine paste filling equipment, and provides a coal mine paste filling mining isolation device which comprises two supports used for being arranged on the two sides of a paste filling area correspondingly. The first carrying frame is rotatably arranged on a support; the second carrying frame is rotatably arranged on the other support; one end of the isolation unit is rotationally connected with the first carrying frame, and the other end of the isolation unit is rotationally connected with the second carrying frame; the multiple packing devices are arranged on the isolation unit at intervals, are in sliding connection with the isolation unit and are used for jacking and isolating the to-be-reinforced position of the paste filling area; the packing device comprises a grouting assembly, and the grouting assembly is used for spraying reinforcing grout to the surface of the position to be reinforced. According to the coal mine paste filling mining isolation device, the isolation unit can be installed in a matched mode, the multiple packing devices can be sequentially distributed at the positions of the to-be-reinforced points of the filling area, and therefore the sealing reliability of the isolation unit is further improved.

Description

Technical Field

[0001] This application relates to the technical field of coal mine paste filling equipment, and more particularly, to a coal mine paste filling and mining isolation device. Background Art

[0002] Currently, paste filling mining is an important branch of coal mine green mining technology. By mixing solid waste such as gangue and fly ash with cementitious materials to form paste slurry and filling it into the goaf, goals such as reducing surface subsidence, controlling mine pressure, and resource utilization of waste are achieved; during the process of coal mine paste filling mining, the isolation device is a key equipment to ensure the effective sealing of paste materials, prevent leakage, and maintain the stability of the roadway structure.

[0003] In the related art, traditional isolation devices mostly adopt fixed steel structures or simple adjustable brackets; due to the complex geological conditions of the roadway, they cannot adapt to the irregular shape of the side wall of the goaf, and problems such as slurry leakage or uneven filling are likely to occur; moreover, the ordinary baffle structure is difficult to cope with the dynamic pressure of the paste material, and gaps are easily generated and leaked, affecting the filling effect. Summary of the Invention

[0004] In order to solve the technical problems that the above traditional isolation device cannot adapt to the irregular shape of the side wall of the goaf, is prone to gap leakage, and affects the filling effect, this application proposes a coal mine paste filling and mining isolation device.

[0005] In view of this, this application proposes a coal mine paste filling and mining isolation device, including: two supports, which are respectively arranged on both sides of the paste filling area; a first carrier frame, which is rotatably arranged on one support; a second carrier frame, which is rotatably arranged on the other support; an isolation unit, one end of the isolation unit is rotatably connected to the first carrier frame, and the other end of the isolation unit is rotatably connected to the second carrier frame; a plurality of sealing devices, which are arranged at intervals on the isolation unit and are slidably connected to the isolation unit, and the sealing devices are used to top-press and isolate the position to be reinforced in the paste filling area; the sealing device includes a grouting assembly, and the grouting assembly is used to spray reinforcing slurry on the surface of the position to be reinforced.

[0006] In some realizable ways, the support includes: a base plate frame; a vertical frame, which is arranged on one side of the base plate frame; a reinforcing frame, which is obliquely connected between the base plate frame and the vertical frame.

[0007] In some realizable ways, the coal mine paste filling and mining isolation device further includes: a first slewing bearing, the fixed end of the first slewing bearing is connected to the vertical frame, and the rotating end of the first slewing bearing is connected to the first carrier frame; a second slewing bearing, the fixed end of the second slewing bearing is connected to the vertical frame, and the rotating end of the second slewing bearing is connected to the second carrier frame.

[0008] In some realizable ways, the isolation unit includes: a first side plate seat rotatably arranged on the first carrier frame; a second side plate seat rotatably arranged on the second carrier frame; and a frame beam, with both ends of the frame beam connected to the first side plate seat and the second side plate seat respectively.

[0009] In some realizable ways, the sealing device further includes: a plate frame; two connecting frames arranged at both ends of the plate frame and on the same side of the plate frame; a guide rod, with both ends of the guide rod connected to the two connecting frames respectively; a friction kit sleeved on the guide rod and slidably connected to the guide rod, and the grouting assembly is connected to the friction kit.

[0010] In some realizable ways, the grouting assembly includes: a main body frame connected to the friction kit, a shaft rod connected to the main body frame, and a positioning plate connected to the other end of the shaft rod; a connecting disk slidably sleeved on the shaft rod, with a plurality of dampers circumferentially distributed on the connecting disk, and the other ends of the plurality of dampers are connected to the positioning plate; a fixed disk arranged at an interval from the connecting disk, with the fixed disk and the connecting disk connected by support columns, and the positioning plate and the dampers are located between the fixed disk and the connecting disk; and a grouting disk arranged on the side of the fixed disk away from the connecting disk.

[0011] In some realizable ways, the sealing device further includes: an oil cylinder arranged on one side of the main body frame, with a shaft plug slidably connected in the oil cylinder, and the shaft plug is connected to the shaft rod; at least two oil pipes are connected to the outside of the oil cylinder, and one of the oil pipes is a pulse pipe for pulse oil supply.

[0012] In some realizable ways, the sealing device further includes: a pipe sleeve sleeved on the shaft rod, and the shaft rod slidably passes through the pipe sleeve; a guide pin is fixed on the side wall of the shaft rod, and a guide groove is formed on the inner wall of the pipe sleeve, and the guide pin is slidably connected to the guide groove.

[0013] In some realizable ways, the guide grooves are configured in multiple groups, and the multiple groups of guide grooves are circumferentially spaced along the inner wall of the pipe sleeve, and the specifications of each group of guide grooves are different; a transition groove is formed on the inner wall of the pipe sleeve, and the transition groove is arranged adjacent to the starting end of the guide groove and communicates with the inlet ends of all the guide grooves; wherein, the transition groove is configured as an annular guiding channel capable of accommodating the circumferential rotation of the guide pin, so that the guide pin can switch paths between different guide grooves.

[0014] In some realizable ways, along the axial direction of the shaft rod, the guide groove includes: a sequentially connected guiding section, a damping adjusting section, and a strengthening section; wherein, the guiding section is a linear structure, and the damping adjusting section and the strengthening section are arc-shaped structures or corrugated structures.

[0015] Compared with the prior art, the present application has the following technical effects: The coal mine paste filling mining isolation device provided by this application has an isolation unit that can be adaptively installed based on the geological conditions and deformation characteristics of the coal mine surrounding rock in the coal mine paste filling area. Multiple sealing devices can be sequentially distributed at the positions of the points to be reinforced in the filling area, thereby further improving the sealing reliability of the isolation unit. Each sealing device can combine the elastic stretching effect of the damper with the spinning effect of the grouting disc, strengthening the top pressure isolation effect on the surrounding rock of the coal mine filling area on the one hand, and improving the isolation tightness through the grouting reinforcement effect of the grouting disc on the other hand.

[0016] The additional aspects and advantages of this application will become apparent in the following description section, or be understood through the practice of this application. Brief Description of the Drawings

[0017] The above and / or additional aspects and advantages of this application will become apparent and be easily understood from the description of the embodiments in conjunction with the following drawings, where: Figure 1 The structural schematic diagram of the coal mine paste filling mining isolation device in an embodiment of this application is shown; Figure 2 The structural schematic diagram of the isolation unit in an embodiment of this application is shown; Figure 3 The structural schematic diagram of the sealing device in an embodiment of this application is shown; Figure 4 The structural schematic diagram of the guide groove in an embodiment of this application is shown; Figure 5 The installation structural schematic diagram of the double-acting hydraulic cylinder in an embodiment of this application is shown.

[0018] Wherein, Figures 1 to 5 The corresponding relationship between the reference numerals and the component names in the drawings is as follows: 100 isolation device, 110 support, 112 base plate frame, 114 vertical frame, 116 reinforcement frame, 120 first carrier frame, 122 second carrier frame, 124 double-acting hydraulic cylinder, 130 isolation unit, 132 first side plate seat, 134 second side plate seat, 136 frame beam, 140 sealing device, 142 plate frame, 143 connecting frame, 145 guide rod, 146 friction kit, 150 grouting assembly, 152 main body frame, 153 shaft rod, 154 positioning plate, 155 connecting plate, 156 damper, 157 fixed plate, 158 grouting disc, 160 oil cylinder, 162 oil pipe, 170 pipe sleeve, 180 guide groove, 182 transition groove. Detailed Description of the Embodiments

[0019] To more clearly understand the above-mentioned objects, features, and advantages of the present application, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0020] In the following description, many specific details are set forth in order to fully understand the present application. However, the present application can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present application is not limited by the specific embodiments disclosed below.

[0021] The following refers to Figures 1 to 5 Describe a coal mine paste filling mining isolation device 100 according to some embodiments of the present application.

[0022] As Figure 1 、 Figure 2 、 Figure 3 And Figure 5 As shown, the present application proposes a coal mine paste filling mining isolation device 100, including: two supports 110, which are respectively arranged on both sides of the paste filling area; a first carrier frame 120, which is rotatably arranged on one support 110; a second carrier frame 122, which is rotatably arranged on the other support 110; an isolation unit 130, one end of the isolation unit 130 is rotatably connected to the first carrier frame 120, and the other end of the isolation unit 130 is rotatably connected to the second carrier frame 122; a plurality of sealing devices 140, which are arranged at intervals on the isolation unit 130 and are slidably connected to the isolation unit 130, and the sealing devices 140 are used to press and isolate the position to be reinforced in the paste filling area; the sealing device 140 includes a grouting assembly 150, and the grouting assembly 150 is used to spray the reinforcing slurry on the surface of the position to be reinforced.

[0023] The coal mine paste filling mining isolation device 100 provided by the present application includes two supports 110, a first carrier frame 120, a second carrier frame 122, an isolation unit 130, and a plurality of sealing devices 140. The two supports 110 are symmetrically arranged on both sides of the paste filling area and are used to support the entire isolation device 100. Carrier frames are provided on both supports 110, namely the first carrier frame 120 and the second carrier frame 122 respectively, and the carrier frames can rotate relative to the corresponding supports 110. Specifically, double-acting hydraulic cylinders 124 are symmetrically arranged below the first carrier frame 120 and the second carrier frame 122. The two cylinder bodies of the double-acting hydraulic cylinders 124 are connected in parallel through a synchronous hydraulic circuit, and the ends of their piston rods are respectively hinged to the bottom of the carrier frames, so that the carrier frames can rotate relative to the supports 110.

[0024] The isolation unit 130 is connected between two carrier frames (i.e., the first carrier frame 120 and the second carrier frame 122), and the positioning angles of the first carrier frame 120 and the second carrier frame 122 are adjusted by the synchronous telescopic control of the double-acting hydraulic cylinder 124, so that the first carrier frame 120 and the second carrier frame 122 can match the surrounding rock deformation in real time, thereby ensuring the dynamic fitting of the isolation unit 130 with the surrounding rock, enabling the entire isolation device 100 to flexibly adapt to paste filling areas of different shapes, sizes and orientations, and enhancing the versatility and adaptability of the isolation device 100.

[0025] By arranging a plurality of slidably connected sealing devices 140 at intervals on the isolation unit 130, and the sealing devices 140 are detachably connected to the isolation unit 130, it is possible to accurately position and top-press and isolate the position to be reinforced in the paste filling area, ensure the pertinence and effectiveness of the reinforcement operation, avoid resource waste, and improve the reinforcement effect at the same time.

[0026] The sealing device 140 includes a grouting assembly 150, and the grouting assembly 150 can rotate to adjust the grouting position. The function of spraying the reinforcement slurry on the surface of the position to be reinforced while isolating is realized, which simplifies the operation process, improves the work efficiency, and can ensure that the reinforcement slurry evenly and accurately covers the surface of the position to be reinforced, further enhancing the reinforcement effect and the stability of the filling body.

[0027] For the coal mine paste filling mining isolation device 100 provided by the present application, the isolation unit 130 can be adaptively installed based on the geological conditions and deformation characteristics of the coal mine surrounding rock in the coal mine paste filling area. A plurality of sealing devices 140 can be sequentially distributed at the positions of the points to be reinforced in the filling area, thereby further improving the sealing reliability of the isolation unit 130.

[0028] As Figure 2 shown, in some embodiments provided by the present application, the support 110 includes: a base plate frame 112; a vertical frame 114 provided on one side of the base plate frame 112; and a reinforcement frame 116 obliquely connected between the base plate frame 112 and the vertical frame 114.

[0029] In this embodiment, the support 110 includes a base plate frame 112, a vertical frame 114 and a reinforcement frame 116. The base plate frame 112 is made of a high-strength alloy steel plate and is anchored to the roadway floor through embedded bolts. The base plate frame 112, the vertical frame 114 and the reinforcement frame 116 cooperate with each other to form a stable triangular support structure. Compared with the support 110 with a single structure, the overall support stiffness and stability are significantly improved, providing a solid and reliable bearing foundation for the coal mine paste filling mining isolation device 100, and capable of effectively resisting external force interference in multiple directions such as paste pressure and equipment vibration during the filling operation.

[0030] The substrate frame 112 is anchored to the roadway floor, capable of dispersing the load transmitted by its upper structure, preventing the support 110 from slipping or overturning in a complex working environment, providing a stable space for the precise operation of each component of the isolation device 100, and ensuring the safe advancement of the paste filling mining operation according to the established process.

[0031] In some embodiments provided by the present application, the coal mine paste filling mining isolation device 100 further includes: a first slewing bearing, the fixed end of the first slewing bearing is connected to the vertical frame 114, and the rotating end of the first slewing bearing is connected to the first carrier frame 120; a second slewing bearing, the fixed end of the second slewing bearing is connected to the vertical frame 114, and the rotating end of the second slewing bearing is connected to the second carrier frame 122.

[0032] In this embodiment, the coal mine paste filling mining isolation device 100 further includes a first slewing bearing and a second slewing bearing. The first slewing bearing and the second slewing bearing respectively realize the rotational connection between the first carrier frame 120, the second carrier frame 122 and the vertical frame 114, and the carrier frame can flexibly rotate at multiple angles around the rotation axis of the slewing bearing. During the coal mine paste filling mining process, according to the trend, shape of different filling areas and actual operation requirements, the angles of the first carrier frame 120 and the second carrier frame 122 can be precisely adjusted, thereby driving the isolation unit 130 to rotate, making the isolation device 100 closely fit the filling area, and realizing efficient and precise isolation operation, avoiding problems such as paste leakage or uneven filling caused by insufficient isolation.

[0033] During the filling operation, in case of sudden situations such as geological condition changes and filling speed adjustment, the operator can control the rotation of the slewing bearing to dynamically adjust the positions of the first carrier frame 120 and the second carrier frame 122 in real time, thereby changing the posture and action range of the isolation unit 130, quickly adapting to the change of operation parameters, and improving the operation flexibility and the ability to cope with complex working conditions.

[0034] As Figure 1 shown, in some embodiments provided by the present application, the isolation unit 130 includes: a first side plate seat 132, rotatably arranged on the first carrier frame 120; a second side plate seat 134, rotatably arranged on the second carrier frame 122; a frame beam 136, both ends of the frame beam 136 are respectively connected to the first side plate seat 132 and the second side plate seat 134.

[0035] In this embodiment, the isolation unit 130 includes a first side plate seat 132, a second side plate seat 134, and a frame beam 136. The first side plate seat 132 is rotatably connected to the first carrier frame 120, and the second side plate seat 134 is rotatably connected to the second carrier frame 122, enabling the entire isolation unit 130 to rotate flexibly. When facing the situation of irregular shape and complex and changeable boundaries in the coal mine paste filling area, the angles of the first side plate seat 132 and the second side plate seat 134 can be flexibly adjusted according to the actual contour of the filling area, thereby driving the frame beam 136 to adapt to different topographies, ensuring that the isolation unit 130 fits tightly with the filling area, effectively blocking the leakage of paste, and improving the filling effect and resource utilization rate.

[0036] During the filling operation, if the filling area undergoes dynamic adjustment due to geological condition changes or construction requirements, the isolation unit 130 can quickly respond through the rotation of the first side plate seat 132 and the second side plate seat 134, and change its own shape and isolation range in real time, without the need for large-scale disassembly and reinstallation of the entire device, shortening the adjustment time, improving the operation efficiency, and adapting to the rapidly changing working conditions requirements in coal mine mining.

[0037] As Figure 3 shown, in some embodiments provided by the present application, the sealing device 140 further includes: a plate frame 142; two connecting frames 143, disposed at both ends of the plate frame 142 and on the same side of the plate frame 142; a guide rod 145, with both ends of the guide rod 145 connected to the two connecting frames 143 respectively; a friction kit 146, sleeved on the guide rod 145 and slidably connected to the guide rod 145, and the grouting assembly 150 is connected to the friction kit 146.

[0038] In this embodiment, the sealing device 140 includes a plate frame 142, two connecting frames 143, a guide rod 145, and a friction kit 146. Two connecting frames 143 distributed vertically are horizontally fixed on one side of the plate frame 142. Two guide rods 145 are vertically arranged between the two connecting frames 143, and two friction kits 146 are slidably arranged on the guide rods 145.

[0039] The stable structure formed by the plate frame 142, the guide rod 145, and the connecting frame 143 can evenly transfer the acting force to the surface to be reinforced during the pressing process, avoiding the problems of damage to the filling body structure caused by excessive local pressure or ineffective isolation due to too small pressure, and ensuring the overall balanced force of the filling area.

[0040] The friction kit 146 is sleeved on the guide rod 145 and slidably connected to the guide rod 145. The grouting assembly 150 is connected to the friction kit 146. The grouting assembly 150 performs position fine-tuning through the sliding connection between the friction kit 146 and the guide rod 145, so that the grouting plate 158 on one side of it can be correspondingly distributed at the relevant reinforcement point positions to perform reinforcement treatment on the reinforcement points.

[0041] AsFigure 3 As shown, in some embodiments provided by the present application, the grouting assembly 150 includes: a main frame 152 connected to the friction kit 146, a shaft rod 153 connected to the main frame 152, and a positioning plate 154 connected to the other end of the shaft rod 153; a connection disk 155 slidably sleeved on the shaft rod 153, with a plurality of dampers 156 circumferentially distributed on the connection disk 155, and the other ends of the plurality of dampers 156 are connected to the positioning plate 154; a fixed disk 157 spaced from the connection disk 155, with the fixed disk 157 and the connection disk 155 connected by support columns, and the positioning plate 154 and the dampers 156 are located between the fixed disk 157 and the connection disk 155; a grouting disk 158 provided on the side of the fixed disk 157 away from the connection disk 155.

[0042] In this embodiment, the grouting assembly 150 includes a main frame 152, a connection disk 155, a fixed disk 157, and a grouting disk 158. The main frame 152 is connected to the friction kit 146, and position fine-tuning is performed through the sliding connection between the friction kit 146 and the guide rod 145, so that the grouting disk 158 on one side thereof can be correspondingly distributed at the relevant reinforcement point positions, enabling the grouting disk 158 to accurately align with the grouting position and ensuring the grouting quality.

[0043] One end of the shaft rod 153 is connected to the main frame 152, and the other end is connected to the positioning plate 154. The connection disk 155 is slidably sleeved on the shaft rod 153 and is spaced from the fixed disk 157 by support columns, forming a stable structure similar to a framework. The positioning plate 154 and the dampers 156 are located between the fixed disk 157 and the connection disk 155, further restricting the relative displacement of each component in space, limiting the grouting assembly 150 from multiple directions, and avoiding situations such as deviation and inclination during the grouting process, improving the accuracy and stability of the grouting operation.

[0044] A plurality of dampers 156 are circumferentially distributed on the connection disk 155, and the other ends of the dampers 156 are connected to the positioning plate 154. The plurality of dampers 156 are circumferentially distributed, and the connection disk 155 is slidably sleeved on the shaft rod 153. When the shaft rod 153 slides and advances towards the surrounding rock side, the grouting disk 158 abuts against the surface of the coal mine surrounding rock. At this time, the dampers 156 are gradually stretched, and the pressure between the grouting disk 158 and the coal mine surrounding rock increases, realizing the isolation and confining pressure on the coal mine surrounding rock, and then surface grouting reinforcement is carried out, achieving the long-term isolation and sealing effect of the coal mine surrounding rock.

[0045] As Figure 3 shown, in some embodiments provided by the present application, the sealing device 140 further includes: an oil cylinder 160 provided on one side of the main frame 152, with a shaft plug slidably connected in the oil cylinder 160, and the shaft plug is connected to the shaft rod 153; at least two oil pipes 162 are connected to the outside of the oil cylinder 160, and one of the oil pipes 162 is a pulse pipe for pulse oil supply.

[0046] In this embodiment, the sealing device 140 further includes an oil cylinder 160. The oil cylinder 160 is arranged on one side of the main frame 152. The piston slides in the oil cylinder 160 and is connected to the shaft rod 153. The oil cylinder 160 is supplied with oil through an oil pipe 162 to drive the piston to move, thereby pushing the shaft rod 153 to accurately displace towards the surrounding rock side. This driving method can precisely control the moving distance and speed of the shaft rod 153, enabling the sealing device 140 to accurately deliver the grouting assembly 150, etc. to the predetermined sealing position according to the actual situation of the surrounding rock and the sealing requirements, avoiding sealing failure caused by position deviation, and improving the accuracy and reliability of the sealing operation.

[0047] At least two of the oil pipes 162 include a pulse pipe, which is used to achieve pulsed oil supply. The other oil pipes 162 among the at least two oil pipes 162 are conventional oil pipes 162. The intermittent high-pressure oil flow generated by the pulsed oil supply acts on the piston, causing the movement of the piston to push the shaft rod 153 to exhibit a pulsed characteristic. The oil cylinder 160 drives the piston through the pulse pipe to push the shaft rod 153 towards the surrounding rock side. The pulsed oil supply can control the propulsion speed (0.5 cm / s - 2 cm / s), avoiding impact damage. When the pulse pipe on the oil cylinder 160 operates at a low frequency, it can be used for the flexible fitting of the initial grouting plate 158 and the surrounding rock. When the pulse pipe operates at a high frequency, it can further enhance the extrusion and isolation effect on the coal mine surrounding rock, enabling a grouting area to be quickly formed on the surface of the surrounding rock.

[0048] The oil cylinder 160 drives the piston by continuously supplying oil through the oil pipe 162, providing a stable propulsion force for the shaft rod 153, ensuring that the sealing device 140 forms a continuous and stable pressure on the surrounding rock side. This continuous pressure can make the grouting plate 158 closely fit the surface of the surrounding rock, reducing gaps and leakage channels, improving the sealing performance of the seal, effectively preventing unnecessary flow of slurry or other fluids inside and outside the sealed area, and ensuring the quality of the sealing operation.

[0049] As Figure 3 shown, in some embodiments provided by the present application, the sealing device 140 further includes: a pipe sleeve 170 sleeved on the shaft rod 153, and the shaft rod 153 slidably penetrates through the pipe sleeve 170; a guide pin is fixed on the side wall of the shaft rod 153, and a guide groove 180 is formed on the inner wall of the pipe sleeve 170, and the guide pin is slidably connected to the guide groove 180.

[0050] In this embodiment, the sealing device 140 further includes a sleeve 170. The shaft 153 is slidably inserted into the sleeve 170. A guide pin is fixed on the side wall of the shaft 153, and a guide groove 180 is formed on the inner wall of the sleeve 170. The guide pin is slidably connected to the guide groove 180. When the guide groove 180 is configured as an arc-shaped structure or a corrugated structure, when the shaft 153 slides axially along the sleeve 170, corresponding torsion can be performed through the sliding connection between the guide pin and the guide groove 180, so that the connection disk 155 on the shaft 153 rotates synchronously, so that the grouting disk 158 can fully spin-press the surrounding rock of the coal mine in the filling area. Especially in the stage of paste filling in coal mines, when the paste is filled under high pressure, the surrounding rock of the coal mine may protrude outward.

[0051] As Figure 4 shown, in some embodiments provided by the present application, multiple groups of guide grooves 180 are configured, and the multiple groups of guide grooves 180 are circumferentially spaced along the inner wall of the sleeve 170, and the specifications of each group of guide grooves 180 are different; a transition groove 182 is formed on the inner wall of the sleeve 170, and the transition groove 182 is arranged adjacent to the starting end of the guide groove 180 and communicates with the inlet ends of all the guide grooves 180; wherein, the transition groove 182 is configured as an annular guiding channel capable of accommodating the circumferential rotation of the guide pin, so that the guide pin can switch paths between different guide grooves 180.

[0052] In this embodiment, multiple groups of guide grooves 180 with different specifications are circumferentially spaced along the inner wall of the sleeve 170, which can provide multiple movement path options for the shaft 153. When facing different surrounding rock characteristics, sealing depths or direction requirements, other guide grooves 180 with different specifications can be switched, so that the shaft 153 moves at different speeds, forces or trajectories, flexibly adapting to complex and changeable sealing operation scenarios and improving the versatility of the device.

[0053] The transition groove 182 arranged adjacent to the starting end of the guide groove 180 serves as an annular guiding channel, enabling the guide pin to smoothly and quickly switch paths between different guide grooves 180. Without complex operations or additional components, the movement direction and mode of the shaft 153 can be changed, saving switching time, improving the efficiency of the sealing operation, and reducing downtime waiting.

[0054] As Figure 4 shown, in some embodiments provided by the present application, along the axial direction of the shaft 153, the guide groove 180 includes: an introduction section, a damping adjustment section and an enhancement section connected in sequence; wherein, the introduction section is a linear structure, and the damping adjustment section and the enhancement section are arc-shaped structures or corrugated structures.

[0055] In this embodiment, the introduction section is linear, which can quickly guide the shaft rod 153 into a predetermined motion trajectory, enabling the packer operation to be quickly and accurately started, improving the overall efficiency. The damping adjustment section and the strengthening section are arc-shaped structures or corrugated structures, which can enable the grouting disc 158 to twist at different angles or return to its original position after twisting during the sliding and advancing process along with the shaft rod 153. On the one hand, it can construct grouting spaces of different shapes on the surrounding rock surface to ensure long-term isolation and sealing after grouting; on the other hand, after the grouting isolation is completed, when the paste is filled in the coal mine, the spinning action of the grouting disc 158 can cooperate with the elastic stretching of the damper 156 to further enhance the top pressure isolation effect on the reinforced area and avoid isolation failure during the high-pressure filling of the paste.

[0056] In a specific embodiment, the present application provides a coal mine paste filling and mining isolation device 100, including a support 110. The support 110 includes two substrate frames 112 horizontally fixed to the bottom surface of the roadway, and the substrate frames 112 are symmetrically arranged on both sides of the paste filling area. Vertically welded and fixed on the substrate frames 112 are vertical frames 114, and the vertical frames 114 and the substrate frames 112 form an L-shaped support structure in combination. An inclined reinforcement frame 116 is arranged between the substrate frame 112 and the vertical frame 114 at an inclination angle between 45° and 60°, forming a triangular stable structure. Among them, the substrate frame 112 is made of high-strength alloy steel plate and is anchored to the roadway floor through embedded bolts. The surface of the substrate frame 112 is designed with anti-slip patterns to enhance friction.

[0057] As Figure 5 shown, the top end of the vertical frame 114 is rotatably assembled with a load frame through a slewing bearing, and double-acting hydraulic cylinders 124 are symmetrically arranged below the load frame on the vertical frame 114. The two cylinder bodies of the double-acting hydraulic cylinders 124 are connected in parallel through a synchronous hydraulic circuit, and the end parts of their piston rods and the bottom of the load frame form hinge points respectively.

[0058] An isolation unit 130 is arranged between the load frames. The positioning angle of the load frames is controlled by the synchronous telescopic movement of the double-acting hydraulic cylinders 124, so that the load frames can match the deformation amount of the surrounding rock in real time, thereby ensuring the dynamic fit of the isolation unit 130 with the surrounding rock.

[0059] The isolation unit 130 includes a first side plate seat 132 and a second side plate seat 134, which are arranged corresponding to the load frames. The first side plate seat 132 and the second side plate seat 134 are both rotatably arranged on the load frames, and two frame beams 136 are fixedly arranged in parallel between the first side plate seat 132 and the second side plate seat 134.

[0060] A plurality of sealing devices 140 are slidably and removably distributed on the frame beam 136. Specifically, internal fissures, cavities and loose areas in the surrounding rock can be identified by ground penetrating radar scanning to generate a three-dimensional geological model, so as to obtain multiple reinforcement points in the paste filling area of the coal mine. The reinforcement points are divided into type A points, type B points and type C points. Among them, type A points (high-risk areas): areas with stress concentration, dense fissures or collapse risks, which need to be reinforced preferentially; type B points (medium-risk areas): areas with local fissures or slight deformation, which need conventional sealing; type C points (stable areas): the surrounding rock is intact and only basic isolation is required. Therefore, according to the spatial distribution characteristics of different types of reinforcement points, the overall installation angle and local parameters of the isolation unit 130 can be dynamically adjusted to obtain the best isolation and protection effect.

[0061] The carrier frame can be rotationally adjusted within an angle range of -15° to 25° around the vertical axis; the negative angle indicates deflection towards the roadway side, and the positive angle corresponds to deflection towards the surrounding rock side. The isolation unit 130 is horizontally or obliquely distributed.

[0062] The sealing device 140 includes a plate frame 142, on one side of which two connecting frames 143 are horizontally fixed and distributed up and down. Two guide rods 145 are vertically arranged between the connecting frames 143, and two friction kits 146 are slidably arranged on the guide rods 145.

[0063] On one side of the guide rod 145, a main frame 152 is vertically arranged. The main frame 152 is fixed to the two friction kits 146. A shaft rod 153 is connected to the center of the main frame 152, and a positioning plate 154 is connected to the end of the shaft rod 153.

[0064] A connecting disk 155 is slidably sleeved on the shaft rod 153. A plurality of dampers 156 are circumferentially distributed on the connecting disk 155, and the other ends of the dampers 156 are connected to the positioning plate 154.

[0065] A plurality of support columns are also distributed on the connecting disk 155. A fixed disk 157 is arranged in parallel on one side of the connecting disk 155, and the other ends of the support columns are connected to the fixed disk 157.

[0066] A grouting disc 158 is provided at the center of the fixed disc 157. Among them, the main body frame 152 can be finely adjusted in position through the sliding connection of the friction kit 146 with the guide rod 145, so that the grouting disc 158 on one side of it can be correspondingly distributed at the positions of relevant reinforcement points. Specifically, a plurality of sealing devices 140 can be slidably distributed along the frame beam 136, and the main body frame 152 in each corresponding sealing device 140 can be further slidably adjusted (fine adjustment range ±10 cm). With the assistance of a laser locator, the deviation between the center of the grouting disc 158 and the reinforcement point is ≤8 cm, so that the grouting disc 158 can contact and distribute at the corresponding reinforcement point positions in the filling area. When the shaft rod 153 slides and advances towards the surrounding rock side, the grouting disc 158 abuts against the surface of the coal mine surrounding rock. At this time, the damper 156 is gradually stretched, and the pressure between the grouting disc 158 and the coal mine surrounding rock increases, realizing the isolation and confining pressure of the coal mine surrounding rock. Then, surface grouting reinforcement is carried out, and nano-epoxy resin can be injected (pressure 5 MPa), the penetration depth of the slurry is 0.4 m, and the filling rate ≥95%, thus realizing the long-term isolation and sealing effect of the coal mine surrounding rock.

[0067] An oil cylinder 160 is horizontally fixed on the main body frame 152 through a bracket. A piston plug is slidably connected in the oil cylinder 160, and one end of the shaft rod 153 is rotatably connected to the piston plug through a bearing. Two oil pipes 162 are connected outside the oil cylinder 160, and one of the oil pipes 162 is set as a pulse pipe. Therefore, the piston plug driven by the oil cylinder 160 through the pulse pipe pushes the shaft rod 153 to move towards the surrounding rock side, and the pulsed oil supply can control the propulsion speed (0.5 - 2 cm / s) to avoid impact damage. Among them, when the pulse pipe on the oil cylinder 160 works at a low frequency, it can be used for the flexible fitting of the initial grouting disc 158 and the surrounding rock, and when the pulse pipe works at a high frequency, it can further enhance the extrusion and isolation effect on the coal mine surrounding rock, so that a grouting area is quickly formed on the surface of the surrounding rock. It should be noted that during the coal mine paste filling stage, the oil cylinder 160 stops working, and at this time, the damper 156 is in a stretched state.

[0068] A bushing 170 is coaxially arranged at the center position of the main body frame 152. The shaft rod 153 is slidably inserted into the bushing 170. A guide pin is fixed on the side wall of the shaft rod 153, and a guide groove 180 is opened on the inner wall of the bushing 170. The guide pin is slidably connected with the guide groove 180. Among them, when the guide groove 180 is set as an arc-shaped structure or a corrugated structure, when the shaft rod 153 slides axially along the bushing 170, it can be correspondingly twisted through the sliding connection of the guide pin and the guide groove 180, so that the connection disc 155 on the shaft rod 153 rotates synchronously, so that the grouting disc 158 can fully spin-press the coal mine surrounding rock in the filling area. Especially during the coal mine paste filling stage, when the paste is filled under high pressure, the coal mine surrounding rock may protrude outward.

[0069] The guide grooves 180 are multiple groups distributed circumferentially, and the specifications of each group of guide grooves 180 are different. A transition groove 182 is formed on the inner wall of the sleeve 170. The transition groove 182 is arranged adjacent to the starting end of the guide groove 180 and communicates with the inlet ends of all the guide grooves 180. That is to say, a shaft rod 153 can be used on the main body frame 152 in each sealing device 140 to slidably cooperate with the corresponding guide groove 180, so that the grouting disc 158 can be twisted at different angles or reset after twisting during the sliding and advancing along with the shaft rod 153. On the one hand, it can construct grouting spaces of different shapes on the surrounding rock surface to ensure long-term isolation and sealing after grouting, so as to adjust the strategy based on the situation of the reinforcement points and achieve refined sealing of "one point, one strategy"; on the other hand, after the grouting isolation is completed, when the paste is filled in the coal mine, the spinning action of the grouting disc 158 can cooperate with the elastic stretching of the damper 156 to further enhance the top pressure isolation effect on the reinforcement area and avoid the isolation failure during the high-pressure filling of the paste. The transition groove 182 is configured as an annular guiding channel that can accommodate the circumferential rotation of the guide pin, so as to facilitate the path switching of the guide pin between different guide grooves 180.

[0070] As Figure 4 shown, the guide groove 180 is divided into three sections, and is sequentially divided into an introduction section, a damping adjustment section, and an enhancement section along the axial direction of the shaft rod 153 close to the side of the positioning plate 154. The length of the introduction section is D1, the length of the damping adjustment section is D2, and the length of the enhancement section is D3. The introduction section is set as a linear structure, while the damping adjustment section and the enhancement section are both set as arc-shaped structures or corrugated structures.

[0071] In Embodiment 1, when the grouting disc 158 completes grouting reinforcement and during the paste filling, after the slurry solidifies, the grouting disc 158 is adhesively fixed to the surrounding rock to form a rigid anchoring point. The grouting disc 158 is fixed on the surface of the surrounding rock. At this time, if the high-pressure filling of the paste causes the surrounding rock to bulge outward, the guide pin on the shaft rod 153 can slide along the enhancement section to the damping adjustment section, the damper 156 is fully stretched, and at the same time, the grouting disc 158 twists along with the shaft rod 153, and the solidified layer on its outside generates micro-deformation (without falling off from the surrounding rock).

[0072] In Embodiment 2, the grouting disc 158 is rotatably arranged in the fixed disc 157, and a torsion spring is arranged between the grouting disc 158 and the fixed disc 157. It should be noted that the torsion spring adopts a high-strength spring. Therefore, before the grouting operation of the grouting disc 158, it can be in a state close to a fixed setting under the action of high elastic force; when the paste is filled, if the high-pressure filling of the paste causes the surrounding rock to bulge outward, the damper 156 is fully stretched, the grouting disc 158 twists along with the shaft rod 153, and at this time the torsion spring is gradually compressed, and the solidified layer and the surrounding rock remain unchanged.

[0073] It should be noted that the positions to be reinforced, reinforcement points, reinforcement point positions, and reinforcement positions described in the text have the same meaning, and all represent the areas that need to be reinforced.

[0074] In this application, the term "a plurality of" means two or more, unless otherwise clearly defined. Terms such as "installed", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "coupled" can be a direct coupling or an indirect coupling through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0075] In the description of this specification, the descriptions of terms such as "one embodiment", "some embodiments", "specific embodiments", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or instance. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0076] The above are only the preferred embodiments of this application and are not intended to limit this application. For those skilled in the art, various changes and modifications can be made to this application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the protection scope of this application.

Claims

1. A coal mine paste filling mining isolation device, characterized in that: include: Two supports are used to be respectively arranged on both sides of the paste filling area; A first carrier frame is rotatably disposed on one of the supports; A second carrier frame is rotatably disposed on another of the supports; an isolation unit, one end of which is rotatably connected to the first carrier frame, and the other end of which is rotatably connected to the second carrier frame; A plurality of sealing devices, which are arranged at intervals on the isolation unit and are slidably connected to the isolation unit, and the sealing devices are used to perform top pressure isolation on the position to be reinforced in the paste filling area; The sealing device comprises a grouting assembly, and the grouting assembly is used to spray reinforcement slurry onto the surface of the position to be reinforced.

2. The coal mine paste filling mining isolation device according to claim 1, characterized in that: The support comprises: substrate rack; A vertical frame, arranged on one side of the substrate frame; The reinforcement frame is connected obliquely between the substrate frame and the vertical frame.

3. The coal mine paste filling mining isolation device according to claim 2, characterized in that: Also includes: A first slewing support, wherein a fixed end of the first slewing support is connected to the vertical frame, and a rotating end of the first slewing support is connected to the first carrier frame; A second swivel support, wherein a fixed end of the second swivel support is connected to the vertical frame, and a rotating end of the second swivel support is connected to the second carrier frame.

4. The coal mine paste filling mining isolation device according to claim 1, characterized in that: The isolation unit comprises: A first side plate seat, rotatably disposed on the first carrier frame; A second side plate seat is rotatably disposed on the second carrier frame; A frame beam, two ends of which are respectively connected to the first side panel seat and the second side panel seat.

5. The coal mine paste filling mining isolation device according to any one of claims 1 to 4, characterized in that: The sealing device further comprises: Board frame; Two connecting frames are arranged at two ends of the plate frame and are located on the same side of the plate frame; A guide rod, both ends of which are connected to the two connecting frames respectively; The friction kit is sleeved on the guide rod and slidably connected with the guide rod, and the grouting assembly is connected with the friction kit.

6. The coal mine paste filling mining isolation device according to claim 5, characterized in that: The grouting assembly comprises: A main frame connected to the friction kit, the main frame is connected to a shaft rod, and the other end of the shaft rod is connected to a positioning plate; A connecting plate is slidably sleeved on the shaft rod, a plurality of dampers are distributed on the circumference of the connecting plate, and the other ends of the plurality of dampers are connected to the positioning plate; A fixed disk is spaced apart from the connecting disk, the fixed disk and the connecting disk are connected via a support column, and the positioning plate and the damper are located between the fixed disk and the connecting disk; The grouting plate is arranged on a side of the fixing plate away from the connecting plate.

7. The coal mine paste filling mining isolation device according to claim 6, characterized in that: The sealing device further comprises: An oil cylinder is arranged on one side of the main frame, a shaft plug is slidably connected in the oil cylinder, and the shaft plug is connected to the shaft rod; At least two oil pipes are connected to the outside of the oil cylinder, one of which is a pulse pipe used for pulse oil supply.

8. The coal paste filling mining isolation device according to claim 6, characterized in that: The sealing device further comprises: A sleeve, sleeved on the shaft, wherein the shaft is slidably connected to the sleeve; A guide pin is fixed on the side wall of the shaft rod, a guide groove is provided on the inner wall of the pipe sleeve, and the guide pin is slidably connected with the guide groove.

9. The coal mine paste filling mining isolation device according to claim 8, characterized in that: The guide grooves are configured into a plurality of groups, the plurality of groups of guide grooves are arranged at intervals along the inner wall of the sleeve in the circumferential direction, and the specifications of the guide grooves in each group are different; The inner wall of the pipe sleeve is provided with a transition groove, which is arranged adjacent to the starting end of the guide groove and is connected with the inlet ends of all the guide grooves; Wherein, the transition groove is configured as an annular guide channel capable of accommodating the circumferential rotation of the guide pin, so that the guide pin can switch paths between different guide grooves.

10. The coal mine paste filling mining isolation device according to claim 9, characterized in that: Along the axial direction of the shaft, the guide groove comprises: an introduction section, a damping adjustment section and a reinforcement section which are connected in sequence; Wherein, the introduction section is a linear structure, and the damping adjustment section and the enhancement section are arc-shaped structures or corrugated structures.

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